A surveyor wants to conduct a poll to see how many people in a town prefer to shop online versus at the local mall. Which polling method is most likely to be biased?

A) Randomly selecting 25 people from a list of customers that shop online and in-store.

B) Randomly calling and polling 100 people.

C) Randomly polling 1000 people at the community center.

D) Polling every other person that exits the mall.